Photos: Gennady Golovkin vs. Daniel Jacobs

Gennady Golovkin and Daniel Jacobs exchange blows during the seventh round of a middleweight title fight on March 18 in New York.

Gennady Golovkin knocks down Daniel Jacobs during the fourth round of their middleweight title fight at Madison Square Garden on March 18.

Daniel Jacobs punches Gennady Golovkin, right, during the fifth round of a middleweight tight fight on March 18 at Madison Square Garden.

Daniel Jacobs lands a right had on Gennady Golovkin during the first round of their middleweight title fight on March 18 in New York.  (Frank Franklin II / Associated Press)

Srisaket Sor Rungvisai of Thailand, right, punches Roman Gonzalez of Nicaragua, during the 11th round of a WBC super-flyweight championship fight on March 18 in New York.

Roman “Chocolatito” Gonzalez bleeds from a cut during his WBC title fight against Srisaket Sor Rungvisai on March 18 at Madison Square Garden.

Srisaket Sor Rungvisai celebrates after earning a majority-decision win over Roman “Chocolatito” Gonzalez for Gonzalez’s WBC junior-bantamweight title on March 18 at Madison Square Garden.

David Carmona hits Carlos Cuadras with a left hand during their super-flyweight bout at Madison Square Garden on March 18.

Carlos Cuadras punches David Carmona during their super-flyweight bout at Madison Square Garden on March 18.

Carlos Cuadras punches David Carmona during the ninth round of their super-flyweight bout on March 18 in New York.

Ryan Martin attacks Bryant Cruz, left, during the seventh round of their lightweight fight on March 18 in New York.

Ryan Martin and Bryant Cruz, left, exchanges exchange blows during their lightweight bout on March 18 at Madison Square Garden.